DARWIN:
It was the logical next step after coming down from the trees.

SIR ISAAC NEWTON:
Chickens at rest tend to stay at rest. Chickens in motion tend to cross
the road.

ALBERT EINSTEIN:
Whether the chicken crossed the road or the road crossed the chicken
depends on your frame of reference.

SHERLOCK HOLMES:
It crossed the road because it was going to catch a train at Victoria
Station at 3:15, to Edinburgh. And how did I know that? Observe, Watson,
the patina of dust on the chicken's feathers, which indicates that it had
been spending time in a library, reading about Scotland. And observe also
that it was humming "Bonnie Lassie" as it waited to cross. Finally, and
most important, observe the train ticket marked Edinburgh, stuffed
under one wing, and the fact that Victoria station was where the chicken
crossed the street, and finally that the only train to Edinburgh this afternoon
is the 3:15....

NEIL ARMSTRONG:
One small step for chickenkind, one giant leap for poultry.

TIGGER:
Because that's what chickens do best! That's the wonderful thing about
Chickens, Chasing Chickens is FUN FUN FUN, And the Wonderful thing about
Chickens Is that when crossing streets they RUN!

THE CHICKEN:
"I am crossing the road to block traffic as a protest against ..."
(thump).

CALCULUS LECTURER:
The road, if expressed in the form (y2-y1)/(x2-x1) is approximate for
cases where lim(y2-y1)/(x2-x1) as (x2-x1) -> 0, is represented by the derivative,
or rate of change, of the road with respect to the chicken, such that the
value of the chicken may be assumed equal to the value of (y2-y1)/(x2-x1),
for small values of roads.

ENGINEER:
The chicken crossed the road as part of an experiment to find the Chicken
Modulus of various road surfaces. The Chicken Modulus is defined as s/a,
the ratio of chicken-vehicle collisions (s) to road surface grit size (a).
The chicken used was the standard european chicken as specified in the
Engineering Publication "Standard Animals for Fauna Testing (1998)".